/* Current room name + topic in the header (issue #12). Lives on the evergreen
   chrome, so it uses the chrome-* tokens and stays readable in both themes. */

.headerRoom {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  min-width: 0; /* allow the topic to truncate instead of pushing the header */
  flex: 1;
  margin: 0 var(--sp-4);
}

.headerRoomName {
  flex-shrink: 0;
  font-size: var(--fs-md);
  font-weight: 650;
  color: var(--chrome-text);
  white-space: nowrap;
}

/* Display mode — a quiet inline button so it is keyboard-focusable when
   editable; non-editable rooms get the same look minus pencil and cursor. */
.headerTopic {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  padding: 3px 8px;
  border-radius: var(--r-sm);
  cursor: default;
  color: var(--chrome-text-dim);
}

.headerTopic.editable {
  cursor: pointer;
}

.headerTopic.editable:hover {
  background: var(--chrome-hover);
  color: var(--chrome-text);
}

.headerTopicText {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: var(--fs-md);
}

.headerTopicText.placeholder {
  font-style: italic;
  opacity: 0.75;
}

/* Pencil appears on hover only — the topic reads as plain text otherwise. */
.headerTopicPencil {
  flex-shrink: 0;
  width: 13px;
  height: 13px;
  opacity: 0;
  transition: opacity var(--t-fast) var(--ease);
}

.headerTopic.editable:hover .headerTopicPencil,
.headerTopic.editable:focus-visible .headerTopicPencil {
  opacity: 1;
}

.headerTopicInput {
  flex: 1;
  min-width: 120px;
  max-width: 420px;
  padding: 4px 8px;
  font: inherit;
  font-size: var(--fs-md);
  color: var(--chrome-text);
  background: var(--chrome-hover);
  border: 1px solid var(--chrome-border);
  border-radius: var(--r-sm);
  outline: none;
}

.headerTopicInput:focus {
  border-color: var(--focus);
}

.headerTopicInput::placeholder {
  color: var(--chrome-text-dim);
}

/* Tight screens: keep the room name, let the topic go first. */
@media (max-width: 640px) {
  .headerTopic,
  .headerTopicInput {
    display: none;
  }
}